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ampaddict

Luxman PD-288 TT speed issue

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Has anyone had any experience with this DD fully automatic TT?

 

I have one with runaway speed issue that the strobe speed adjust is unable to reign in. The speed gradually builds to very fast then slows again and continues this fluctuation. The auto mechanism of the unit works fine, it just runs at a very inconsistent speed. Have cleaned the strobe speed pots to no avail. It looks like there are motor speed adjustments via 2 VR's on the motor control board. However, I'm not convinced it would simply be an adjustment of a VR, given the inconsistency. My next step would be to remove the motor and check all components on the control board. Perhaps some caps are out of spec, open res or noisy trans??? It's a nice TT so worth repairing I think.

 

Any advice greatly appreciated.

 

Cheers,

Brad

 

20191216_135528.jpg

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Caps would be my check. I have a PD264 and that wanders a little, so thinking of recapping.

Edited by Batty

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certainly wouldn't hurt as I'm sure they are all under spec. The motor control board is going to be tricky to remove as it's plastic welded to the motor chassis. 

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